Set class for get_post

Is it possible to set a css class specific to the last post returned with the get_post function? We have our ui li tags setup with a horizontal bar dividing each post. Without being able to set a class specific to the last post returned we end up with an unwanted horizontal

<ul>
<?php
global $post;
$args = array( 'numberposts' => 5, 'offset'=> 1, 'category' => 1 );
$myposts = get_posts( $args );
foreach( $myposts as $post ) :	setup_postdata($post); ?>
	<li><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></li>
<?php endforeach; ?>
</ul>